<template>
	<view class="content">
		<scroll-view scroll-y class="left-aside">
			<view v-for="item of flist" :key="item._id" class="f-item b-b" :class="{active: item.name === currentId}" @click="tabtap(item)">
				{{item.name}}
			</view>
		</scroll-view>
		<scroll-view scroll-with-animation scroll-y class="right-aside" @scroll="asideScroll" :scroll-top="tabScrollTop">
			<view v-for="item in slist" :key="item._id" class="s-list" :id="'main-'+item.id">
				<view v-if="item.parent_id == currentId">
					<text class="s-item">{{item.name}}</text>
					<view class="t-list">
						<view @click="navToList(titem.name)" v-if="titem.parent_id === item.name" class="t-item" v-for="titem in tlist" :key="titem._id">
							<!-- <image :src="titem.picture"></image> -->
							<text>{{titem.name}}</text>
						</view>
					</view>
				</view>
			</view>
		</scroll-view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				categories: [],
				sizeCalcState: false,
				tabScrollTop: 0,
				currentId: '日用品',
				flist: [],
				slist: [],
				tlist: [],
			}
		},
		onLoad(){
			  this.loadData();
		},
		methods: {
			async loadData(){
				let vm = this;
				const db = uniCloud.database();
				db.collection('opendb-mall-categories')
				  .field("parent_id,name,description")
				  .get()
				  .then(res => {
						vm.categories = res.result.data;
						vm.categories.forEach(item=>{
							if(/1级/.test(item.description)){
								vm.flist.push(item);
							}else if(/2级/.test(item.description)){
								vm.slist.push(item);
							}else{
								vm.tlist.push(item);
							}
						})
					})
			},
			//一级分类点击
			tabtap(item){
				this.currentId = item.name;
			},
			navToList(tid){
				uni.navigateTo({
					url: `/pages/product/list?tid=${tid}`
				})
			}
		}
	}
</script>

<style lang='scss'>
	page,
	.content {
		height: 100%;
		background-color: #f8f8f8;
	}

	.content {
		display: flex;
	}
	.left-aside {
		flex-shrink: 0;
		width: 200upx;
		height: 100%;
		background-color: #fff;
	}
	.f-item {
		display: flex;
		align-items: center;
		justify-content: center;
		width: 100%;
		height: 100upx;
		font-size: 28upx;
		color: $font-color-base;
		position: relative;
		&.active{
			color: $base-color;
			background: #f8f8f8;
			&:before{
				content: '';
				position: absolute;
				left: 0;
				top: 50%;
				transform: translateY(-50%);
				height: 36upx;
				width: 8upx;
				background-color: $base-color;
				border-radius: 0 4px 4px 0;
				opacity: .8;
			}
		}
	}

	.right-aside{
		flex: 1;
		overflow: hidden;
		padding-left: 20upx;
	}
	.s-item{
		display: flex;
		align-items: center;
		height: 70upx;
		padding-top: 8upx;
		font-size: 28upx;
		color: $font-color-dark;
	}
	.t-list{
		display: flex;
		flex-wrap: wrap;
		width: 100%;
		background: #fff;
		padding-top: 12upx;
		&:after{
			content: '';
			flex: 99;
			height: 0;
		}
	}
	.t-item{
		height: 100rpx;
		flex-shrink: 0;
		display: flex;
		justify-content: center;
		align-items: center;
		flex-direction: column;
		width: 176upx;
		font-size: 26upx;
		color: #666;
		padding-bottom: 20upx;
		
		image{
			width: 140upx;
			height: 140upx;
		}
	}
</style>
